Summoners have better things to do than get deadlocked into spamming sustain, physic, summons on their pets constantly. Especially from unavoidable damage and damage the no pet can be trusted to evade (yes even Garuda is not safe just like any spellcaster who refuses to move).

On top of that you can see their HP bar by default simply by looking at them, unless you turned that off for some awful reason. >:|

Damage Dealers' job is to deal damage, NOT healing. Responsibilities change while solo.

Healers' job is to heal the entire party. Pets are a significant power to pet jobs, without them, they aren't good. Very simple to understand. Having to toss a pet a regen is nothing to get all pissy about. I easily do it on a whim cause it's THAT easy, most of the time by AoE healing. SMNs don't have to worry about pets dying, no sustain=happy SMN melting peoples faces with their pet in glee. I don't care if MCHs can bring their turrets back on whim, they're getting healed too. I'll even do it for SCH's pets even if he's my co healer, because if the fairy is hurt, then she will use embrace on herself, which is a terrible, TERRIBLE thing to let happen. None of this needs to be spelled out. But of course loads of healers just snooze about and be obsessed with DPS in this game.